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• Topic Timeline (Monthly)
• Topic Timeline (Yearly)

	Natural Environment
	2020
Weather
Plants / Kelp
Ocean / Sea
Land
Surface Waters / Wetlands
Insects
Land Mammals
Marine Mammals
Fish
Birds
Air
Invertebrates
Atmosphere
Groundwater
Arachnids
	Unusual or Unexpected Event
	2020
Unusual Range / Sighting
Extreme Temperature
Fire
Unusual Size / Abundance
Extreme Precipitation
Death / Die-off / Decline
Permafrost Change
Pollution
Seasonal Timing
Pathogen
Unusual Animal Behavior
Ice / Snow Change
Flooding / Draining
Infestation
Extreme Wind
Deformity / Disease / Injury
Thunderstorm
Earthquake
Parasite
Drought
Algal Bloom
Glacier Change
Storm Surge
Erosion
Landslide / Avalanche
Tsunami
Debris / Trash
Sinkhole / Crater
Rain on Snow
Sea/Land Level Change
	Impact on Human Environment
	2020
Safety
Sports / Recreation
Human Health
Buildings
Food Security
Air Quality
Economic Impact
Cultural Impact
Forestry
Water Security
Fisheries
Harvest Change
Transportation
Agriculture
Displacement
Energy
Radiation
Aquaculture
Pets
Sanitation